TX Houston/Galveston TX Zone Forecast July 29, 2021 FacebookTwitterEmail _____ National Weather Service Houston/Galveston TX 443 PM CDT Thu Jul 29 2021 TXZ211-300900- 443 PM CDT Thu Jul 29 2021 .TONIGHT...Partly cloudy early in the evening then becoming mostly clear in the evening then becoming partly cloudy after midnight. A 20 percent chance of showers and thunderstorms early in the evening. Lows in the mid 70s. Southeast winds 5 to 10 mph. Heat index readings 103 to 108. .FRIDAY...Partly cloudy. A 30 percent chance of showers and thunderstorms in the afternoon. Highs in the mid 90s. Southeast winds 5 to 10 mph. Heat index readings 104 to 109. .FRIDAY NIGHT...Partly cloudy early in the evening then becoming